PowerGUI.org is holding the PowerPack Challenge contest. Basically, the idea is that you create a PowerGUI add-on (admin console for a particular platform you manage based on PowerShell cmdlets/scrips), and then submit it to the site. By entering the contest, you can win one of the prizes (the top prizes are $1000 in Amazon certificates). This is easy and the site has tutorials on how to do this.
The contest will run for 3 more days, i.e. until the end of Nov 15 2009. You can get full details at PowerGUI.Org. Get coding and best of luck!